Does anyone know how to update an AAI for an inventory transaction? We have an inventory transaction that INCREASES the inventory account when it should be DECREASING the account.
Which inventory transaction? Guessing someone has put the details in back to front. You'll be looking in the DMAAI's at the 4100 series but it will depend on what sort of transaction it is. You can have a look here for details: https://docs.oracle.com/cd/E26228_01/doc.93/e21560/setup_aai.htm#WEAIM521
Sounds that you have the 4122 and 4124 reversed for a document type = IA. For document type = IT, the 4122 and 4124 would be the same INVENTORY asset GL account. So please be cautious of the DMAAI and the Transaction set that you wish to drive.